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Control and Use of a Miniaturized Droplet Generator
Author(s) -
Blümcke Erich,
Eickhoff Heinrich,
Hassa Christoph
Publication year - 1991
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.19910080154
Subject(s) - body orifice , drop (telecommunication) , turbulence , mechanics , laminar flow , materials science , optics , electrical engineering , physics , mechanical engineering , engineering
A miniaturized droplet generator with some new features, working on the principle of laminar liquid jet instability and break‐up was designed. The instrument has been used to study the dispersion of monosized droplets in a turbulent swirling flow, exhibiting the main features of combustion chamber flows of modern gas turbines. The operating range of the generator was evaluated by phase‐Dopper anemometry (PDA). It was demonstrated that the device also works in some metastable operating modes, producing coherent droplet streams with very small standard deviations for drop size and drop velocity. Special attention was directed to the reliability of the device and to the control of drop size. The PDA measurements showed that, in contrast to the evaluated optimum excitation frequency, the drop size cannot be determined from the orifice diameter.